Pipe wrench



July 10,- 1928.

N. SPANOVIC PIPE WRENCH Filed Jan. 27, 1927 2 Sheets-Sheet Jvx/umllI-ucM/MO Spa/v0 w (r July 10, 1928. 1,676,507

N. SPANOVIC v PIPE WRENCH 7 Filed Jan. 27, 1927 2 sheets-sheet 2Patented July 10, 1928.

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PIPE WRENCH;

My-present invention relates to improve= ments in pipe wrenches of theclass employing a movable and removable outer aw and a stationary orfixed jaw, in combination with an oscillatable, circular head, and anon-traveling rotarynut retainedin the head by the shank of the movableouter aw. The movablejaw is adapted to beatlpped onthe axis of thecircular head when the wrench is used, to insure an eflicient gripon thepipe or other round object, A spring detent is utilized inconnection'with the circular head for maintaining it normally inposition and to permit the necessary 0scillation of the head when themovable jaw is tipped. I

By the utilization of the novel combinationsand arrangements of parts ofthe device of my invention a wrenchisprovided which is neat inappearance; properly balanced and symmetrically arranged as to theweight and location ofwits parts; and which is provided with a smoothexterior of proper shape to insure convenience and comfort to the userwhile manipulating the wrench. Due to the simplicity in construction andcompact arrangement of parts-the wrench may readily and with. facilitybe adjusted for use with various diameters of pipes and made to firmlygrip the pipe or other round object for effective use. T v

The invention, consists in certain novel combinations and arrangementsof parts as will hereinafter be more fully set forth and claimed. j

In the accompanying drawings I have illustrated one completefexample ofthephysical embodiment of my invention wherein the parts are combinedand arranged according to the best mode I have thus far devised for thepractical application of the principles of my invention.

Figure 1 is an exterior view of a wrench embodying my invention.

Figure 2 is an edge view of the wrench as seen from the left in Figure1.

Figure 3 is a sectional detail view, partly in elevation, showing theoperating parts of the wrench.

Figure 4 is a transverse sectional view at line L4 of Figure 1 showingthe face of the non-traveling nut.

Figure 5 is a sectional detail view at line 5-5 of Figure 1 showing theend of the threaded shank in the recess of the body of the wrench.

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NINKO sranovr -or'nueunsnn, PENNSYLVANIA Figure 6 is a sectional detailviewof the circular head. v

Figure 7 is afseotional detail view of the v on circular head at line 77 ofFigure 6. e I

The outer movable j aw 1 is fashioned integralwith a head 2, and thethreaded shank I .3 is adapted tobeinsert ed in and is re movable fromthe interior recess 4 of the hollow body 50f the wrench. .A handle "6 iseXtended from the hollowbo'dy and is usedin manipulating the wrench,"the shank 1.. 1 3 being adapted to move the jaw 1 withre.-"'

lation to its complementary fixed jaw 7. The fixed jaw 7v is preferablyattached'to the body of the wrench and is therefore fashioned with atongue 8 that'seats in a complementary slot 9, and the transverselyextending rivet or pin 10 passing through the walls of the slot and thetongue, secures Wrench. 7 i

The threaded; shank 3 encased within the hollow body that forms a framei vable to' change the relation between the movable jaw and the fixedjaw, and this shank is the j awsinfixed relation to the body ofthe tillalso adapted to be tippedv or oscillated to insure a firm grip of thetwo jaws on the object, as a pipe, when the wrench is being 1 used. V 1

Within the hollow body ofthe Wrench a circular opening 11 is providedfor the .reception and accommodation of acircular head 12 which isadapted, within; limits,*to oscillatein the openings ofthe walls of thehollow body, which openings are filled by the head; Thehead retains theshank 3 and for this. purpose is provided withfa p'airjof alined slots13, 13 through which the shank may move freely and the head is alsoprovidedwith an open, transverse slot 14 for the-accommodat1on of around, non-traveling nut 15, that engages the threaded shank to move thelatter and adjust the movable jaw with relation to the fixed jaw. Thenut is turned as usual between the thumb and first finger, and to guidethe thumb and [in ger, and protect them, inmanipulating the nut Iprovide concave lugs or wing portions 16 arranged in pairs at each sideof the circular head. These lugs are arranged in pairs at opposite sidesof the Wrench body and also inpairs at opposite sides of'the travelingnut, and the curvature of the lugs conforms to that of the not. Thus thethumb and finger may be guided by the lugs to the periphery of thenutfor turning the 14s are enlarged by the use of thelugs 16 :to provideincreased and ample bearing surface latter, and the lugs prevent thefinger or thumb from being pinched or caught by the nut while the latteris being turned. It will be apparent that the inner adjoining :tacesforming the opposite walls of the open slot for guiding the rotarymovement of the nut 15 when the movable jaw is being adjusted.

Spring '1'9 with lug 18 in the cam socket 17 holds the movable jaw atthe zero point of oscillation to either side. The first action of thespring assists in grasping the pipe by pulling the movable jaw closer tothe fixed by'the application of thewrench 'to the pipe. The secondaction of the spring, or

the oscillation on the other side of the zero pointlielps to release thehold from the pipe by pulling the movable aw away from the fixed jaw.Both 'actions of the spring bring the-oscillation back to the zero pointbecause of the fact-that the lug 18 is being wedged between the walls ofthe socket under tension'ofthespr'ing. I v Byapp'ly-ing the wrench on apipe, the oscillation starts at zero and goes to one extreme before thepressure is applied to the.

handle 6, and then when the working pressure is applied on the handlethe oscillation goes'from one extreme across the zero point to the otherextreme. WVhen pressure is fina ll released from handle '6' theoscillation goes ack to Zero, or the normal point.

' The oscillating head is normally held in position by means co-actingwith the socket tion on the movable jaw. When not in use the springnormally tends to hold open the movable jaw, and it is adapted todisengage the movable jaw it-rom the work after pressure has beenreleased from the wrench jaws.

. .On the exterior of the body of the wrench I provide circular recesses21 tor the accommodation of the thumb or finger, and at the end of thehandle 6 an opening or hole 22 is fashioned for the puropseot hanging upthewren'ch when not in use. r

Having thus fully described my invention What I claim as new and desireto secure by Letters Patent'is: I

1. In a wrench, thecombination of a hollow body having a head andcircular openings 'in-its walls, a circular head in said openings havinga transverse slot opening at one side of the head, a circular nut in thecircular head, a 'fiXed'jaw on the body, a

movable jaw having a shank threaded into the nut and passing throughsaid clrcular head, a pair of concave lugs on the exterior of and atopposite sides of the-circular head for guiding the finger and thumbto'the 'nut, said circular head having-a socket, a spring in the hollowbody, and a lug on said spring engaging the socket for the purposedescribed. i

2. In a wrench, the combination ot a hollow bodyhaving a head withopenings in itswalls, anoscillatible head in'said openings having atransverse slot opening at one side of the head, a nut 'in'theoscillatible head, a liXedfj aw on the body, a movable'j aw having ashank threaded into the, nut and a spring engaging the oscillatible headto normally hold it in at itscenter of oscillation, to apply the movablejaw to the work, and-to disengage said jaw from the work when the wrenchis in use. I

In testimony whereof I have 'a'fiiXe-d my signature.

NINKO SPANOVIC.

passing through said oscillatible head, and

